API 级别是一个对 Android 平台版本提供的框架 API 修订版进行唯一标识的整数值。
N
M
LOLLIPOP_MR1
LOLLIPOP
KITKAT_WATCH
KITKAT
JELLY_BEAN_MR2
JELLY_BEAN_MR1
JELLY_BEAN
ICE_CREAM_SANDWICH_MR1
ICE_CREAM_SANDWICH
HONEYCOMB_MR2
HONEYCOMB_MR1
HONEYCOMB
GINGERBREAD_MR1
GINGERBREAD
FROYO
ECLAIR_MR1
ECLAIR_0_1
ECLAIR
DONUT
CUPCAKE
BASE_1_1
BASE